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0cib'5 E)I C;:,tIn <br /> T , <br /> R K 0 Homebuilders Inc . 12/19/96 <br /> 3134 130th Ave. N.W. <br /> coon Rapids , T.Ann. <br /> .lob Site; Lot 7 Blk 1 Meadow -Wood Addition, Orono, Yinn. <br /> Percolation teats and soil boiling were done on this lot in July of 1993 <br /> and at that time it was determine that there was two sites that are <br /> suitable to locate mound systems on. <br /> See the report dated8/9/96 fox' the details. <br /> ed in the spring These sites should be rechecked p g to see if the percolation <br /> h <br /> rates are the same, percolation tests aan not be accurately done at th1,s <br /> time due to the winter conditions. <br /> However the land conditions are the same as was encounter in 1993 <br /> ( no fill was added or excavtion occured on the proposed sites ) therefore <br /> It can be assumed that the same percolation rates exist. <br /> Borings were done and mmottled. soil was found at 18 inches , this is the <br /> same level that was found in 1993• <br /> Therefore at this time we will use the same percolation rates to size <br /> out the mound system at this time, however future perc tests will be <br /> done in the spring ( prior to installation) to verify this sizing <br /> factor. <br /> The ave. perc. rate in the primary site was 39.3 min/in. and. the depth <br /> to n,ottl'd soil was at 18-24 inches. <br /> The size of mound system needed fox' a 4 bedroom home 4-based-en <br /> ( based on 600 gal/day daily water useage and a perc . rate range of 4 <br /> 46-60 min/in. the sizing factors ) would be the following size; <br /> OVERALL SIZE 352E SQ.FT. <br /> Tjpslope Length---79 ft. Downslope Length--93 ft. Width--41 ft. <br /> Rock Bed Size---550 sq. ft. Width--10 ft. Length--55 ft. <br /> Amount of materials needed ; <br /> Sand---- 230 yds. 325 tons Ave. Depth--1 . 7 ft. <br /> Rock-- 21 yds. 30 tons -1 . 0 ft. <br /> Sandy Loam 40 yds --1 . 0 ft. <br /> Topsoil---100 yds. ---9 inches <br /> The above amounts could vary by plus or minus- 10 . <br /> This mound must be pressurized therefore -'a pump tank. and a pump is needed ; <br /> Size of pump tank--1000 gallon <br /> Size of pump-- 40 g.p.m(must overcome at leastl.$,' ft. head press. ) <br /> Pumping Rate--:i73 gal/circle( 4 cycles/day) <br /> An alarm system must be installed in the house to indicate pump failure <br /> this must be both a sound and a light alarm system. <br /> SII <br /> *x1t65 Or �' <br />